Ian McKellen

Ian McKellen

"I'm going to marry Patrick [Stewart]," Sir Ian McKellen announced, cheekily, on the U.K.'s Jonathan Ross Show. "I am going to officiate at his wedding." Stewart, 73, hasn't set a date for his nuptials with 35-year-old girlfriend, singer Sunny Ozell, but when they marry in Massachusetts later this year, his X-Men costar will be ready for action. (The state allows friends and family to officiate at a wedding for a one-time $25 fee.) "I've done it once before with two guys having a civil partnership," McKellen explained. "I was crying my eyes out." And he's learned an important lesson for the next ceremony: Last time, he wore "a white gown which I bought in India. You mustn't upstage the bride."

Emma Stone

Emma Stone

After having introduced her publicist, Holly Shakoor, to Gangster Squad director Ruben Fleischer, Emma Stone was given the honor of officiating at the couple's wedding in 2012. At the ceremony at Twin Peaks Ranch in Ojai, California, Stone told personal stories about the couple, and according to an eyewitness "didn't seem nervous at all." Other guests at the wedding included Stone's boyfriend, Andrew Garfield, as well as Christina Hendricks, Gabrielle Union, and Sofia Vergara, who tweeted a photo of herself inhaling some wedding cake.